/Engine/Source/Runtime/Engine/Public/BonePose.h
Set a bunch of Component Space Bone Transforms. Do this safely by insuring that Parents are already in Component Space, and any Component Space children are converted back to Local Space before hand.
void SafeSetCSBoneTransforms ( const [TArray](API\Runtime\Core\Containers\TArray)< struct [FBoneTransform](API\Runtime\Engine\FBoneTransform) > & BoneTransforms )